Concept Guide

DSCP Value WMM Access Category
32 Video
40
48 Voice
56
By customizing WMM AC mappings, all packets received are matched against the entries in the mapping table
and prioritized accordingly. The mapping table contains information for upstream (client to W-IAP) and
downstream (W-IAP to client) traffic.
You can configure different WMM to DSCP mapping values for each WMM AC when configuring an SSID profile
either in the Instant UI or CLI.
In the Instant UI
1. Navigate to the WLAN wizard (click Network>New or Network> Select the WLAN SSID>edit).
2. Click Show advanced options under WLAN Settings.
3. Specify the appropriate DSCP mapping value within a range of 0-63 for the following access categories in
the DSCP mapping field:
l Background WMM—DSCP mapping for the background traffic.
l Best effort WMM—DSCP mapping for the best-effort traffic.
l Video WMM—DSCP mapping for the video traffic.
l Voice WMM—DSCP mapping for the voice traffic.
4. Click Next and complete the configuration as required.
In the CLI
(Instant AP)(config)# wlan ssid-profile <name>
(Instant AP)(SSID Profile <name>)# wmm-background-dscp <dscp>
(Instant AP)(SSID Profile <name>)# wmm-best-effort-dscp <dscp>
(Instant AP)(SSID Profile <name>)# wmm-video-dscp <dscp>
(Instant AP)(SSID Profile <name>)# wmm-voice-dscp <dscp>
(Instant AP)(SSID Profile <name>)# end
(Instant AP)# commit apply
You can configure up to 8 DSCP mappings values within the range of 0-63. You can also configure a
combination of multiple values separated by a comma, for example, wmm-voice-dscp 46,44,42,41.
QoS for Microsoft Office Lync
Voice and video devices use a signaling protocol to establish, control, and terminate voice and video calls. These
control or signaling sessions are usually permitted using pre-defined ACLs. If the control signaling packets are
encrypted, the W-IAP cannot determine the dynamic ports are used for voice or video traffic. In these cases,
the W-IAP has to use an ACL with the classify-media option enabled to identify the voice or video flow based on
a deep packet inspection and analysis of the actual traffic. Instant identifies and prioritizes voice and video
traffic from applications such as Microsoft Office Lync.
Dell Networking W-Series Instant 6.4.3.1-4.2.0.0 | User Guide Voice and Video | 274